#!/usr/bin/env ruby

require 'logger'
require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem "mongoid", "#{ENV["MONGOID_VERSION"] || '8.0.10'}"
  gem "debug", "~> 1.7"
  gem "minitest", require: "minitest/autorun"
end

require 'mongoid'

Mongoid.configure { |c| c.clients.default = { hosts: ['localhost'], database: 'test' } }
puts Mongoid::VERSION

class Address
  include Mongoid::Document
  field :city, type: String
  embedded_in :person
end

class Person
  include Mongoid::Document
  field :name, type: String
  embeds_many :addresses
end

Person.delete_all
Address.delete_all

alice = Person.create(name: "Alice")
alice.addresses = []
alice.save
alice.reload
puts alice.attributes.inspect # {"_id"=>BSON::ObjectId('68b868bdfff9e32aa75132f9'), "name"=>"Alice", "addresses"=>[]}

# Assign attributes with empty addresses get persisted, expect to not persist
bob = Person.create(name: "Bob")
bob.assign_attributes(addresses: [])
puts bob.attributes.inspect # {"_id"=>BSON::ObjectId('68b868bdfff9e32aa75132fa'), "name"=>"Bob"}
bob.reload
puts bob.attributes.inspect # {"_id"=>BSON::ObjectId('68b868bdfff9e32aa75132fa'), "name"=>"Bob", "addresses"=>[]}

# Assign attributes with non-empty addresses will not persist as expected
bob = Person.create(name: "Bob")
bob.assign_attributes(addresses: [Address.new(city: "New York")])
puts bob.attributes.inspect # {"_id"=>BSON::ObjectId('68b8697ca91a01bedad64928'), "name"=>"Bob", "addresses"=>[{"_id"=>BSON::ObjectId('68b8697ca91a01bedad64929'), "city"=>"New York"}]}
bob.reload
puts bob.attributes.inspect # {"_id"=>BSON::ObjectId('68b8697ca91a01bedad64928'), "name"=>"Bob"}